./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:53:25,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:53:25,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:53:25,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:53:25,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:53:25,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:53:25,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:53:25,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:53:25,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:53:25,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:53:25,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:53:25,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:53:25,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:53:25,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:53:25,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:53:25,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:53:25,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:53:25,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:53:25,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:53:25,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:53:25,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:53:25,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:53:25,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:53:25,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:53:25,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:53:25,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:53:25,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:53:25,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:53:25,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:53:25,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:53:25,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:53:25,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:53:25,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:53:25,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:53:25,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:53:25,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:53:25,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:53:25,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:53:25,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:53:25,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:53:25,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:53:25,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:53:25,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:53:25,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:53:25,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:53:25,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:53:25,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:53:25,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:53:25,609 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:53:25,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:53:25,610 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:53:25,610 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:53:25,611 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:53:25,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:53:25,611 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:53:25,612 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:53:25,612 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:53:25,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:53:25,612 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:53:25,613 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:53:25,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:53:25,614 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:53:25,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:53:25,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:53:25,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:53:25,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:53:25,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:53:25,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:53:25,615 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:53:25,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:53:25,616 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:53:25,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:53:25,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:53:25,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:53:25,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:53:25,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:53:25,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:53:25,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:53:25,618 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:53:25,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:53:25,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:53:25,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:53:25,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:53:25,619 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 [2021-11-25 18:53:25,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:53:25,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:53:25,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:53:25,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:53:25,955 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:53:25,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-25 18:53:26,025 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/data/8957f892d/8117bc8cf2d34b5a830a56cc773a64d3/FLAG3f01db3e9 [2021-11-25 18:53:26,680 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:53:26,680 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-25 18:53:26,715 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/data/8957f892d/8117bc8cf2d34b5a830a56cc773a64d3/FLAG3f01db3e9 [2021-11-25 18:53:26,886 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/data/8957f892d/8117bc8cf2d34b5a830a56cc773a64d3 [2021-11-25 18:53:26,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:53:26,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:53:26,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:53:26,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:53:26,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:53:26,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:53:26" (1/1) ... [2021-11-25 18:53:26,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd5cf1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:26, skipping insertion in model container [2021-11-25 18:53:26,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:53:26" (1/1) ... [2021-11-25 18:53:26,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:53:27,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:53:27,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-25 18:53:27,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:53:27,649 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:53:27,766 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-25 18:53:27,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:53:27,802 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:53:27,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27 WrapperNode [2021-11-25 18:53:27,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:53:27,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:53:27,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:53:27,805 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:53:27,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:27,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:27,921 INFO L137 Inliner]: procedures = 96, calls = 359, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 966 [2021-11-25 18:53:27,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:53:27,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:53:27,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:53:27,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:53:27,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:27,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:27,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:27,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:27,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:28,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:28,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:28,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:53:28,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:53:28,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:53:28,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:53:28,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (1/1) ... [2021-11-25 18:53:28,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:53:28,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:28,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:53:28,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:53:28,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:53:28,122 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 18:53:28,122 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 18:53:28,123 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-25 18:53:28,123 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-25 18:53:28,123 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 18:53:28,123 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 18:53:28,123 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 18:53:28,123 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 18:53:28,124 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 18:53:28,124 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 18:53:28,124 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 18:53:28,124 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 18:53:28,124 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 18:53:28,124 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 18:53:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 18:53:28,125 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 18:53:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 18:53:28,125 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 18:53:28,125 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 18:53:28,125 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 18:53:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 18:53:28,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 18:53:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 18:53:28,126 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 18:53:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 18:53:28,127 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 18:53:28,127 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 18:53:28,127 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 18:53:28,127 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 18:53:28,128 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 18:53:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-25 18:53:28,128 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-25 18:53:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 18:53:28,128 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 18:53:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-25 18:53:28,129 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-25 18:53:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 18:53:28,129 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 18:53:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 18:53:28,129 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 18:53:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 18:53:28,130 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 18:53:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 18:53:28,130 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 18:53:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:53:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 18:53:28,132 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 18:53:28,132 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 18:53:28,133 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 18:53:28,133 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 18:53:28,133 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 18:53:28,134 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 18:53:28,134 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 18:53:28,134 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 18:53:28,135 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 18:53:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:53:28,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:53:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 18:53:28,135 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 18:53:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-25 18:53:28,136 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-25 18:53:28,365 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:53:28,367 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:53:29,545 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:53:30,230 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:53:30,231 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:53:30,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:30 BoogieIcfgContainer [2021-11-25 18:53:30,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:53:30,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:53:30,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:53:30,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:53:30,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:53:26" (1/3) ... [2021-11-25 18:53:30,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff80644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:30, skipping insertion in model container [2021-11-25 18:53:30,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:27" (2/3) ... [2021-11-25 18:53:30,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff80644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:30, skipping insertion in model container [2021-11-25 18:53:30,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:30" (3/3) ... [2021-11-25 18:53:30,244 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product24.cil.c [2021-11-25 18:53:30,251 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:53:30,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:53:30,314 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:53:30,324 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:53:30,324 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:53:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2021-11-25 18:53:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:53:30,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:30,387 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:30,388 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash -951121915, now seen corresponding path program 1 times [2021-11-25 18:53:30,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:30,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009203575] [2021-11-25 18:53:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:30,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:53:31,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:31,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009203575] [2021-11-25 18:53:31,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009203575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:31,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:31,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:53:31,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720392892] [2021-11-25 18:53:31,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:31,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:53:31,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:31,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:53:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:53:31,075 INFO L87 Difference]: Start difference. First operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:53:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:32,086 INFO L93 Difference]: Finished difference Result 1240 states and 1966 transitions. [2021-11-25 18:53:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:53:32,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2021-11-25 18:53:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:32,113 INFO L225 Difference]: With dead ends: 1240 [2021-11-25 18:53:32,113 INFO L226 Difference]: Without dead ends: 808 [2021-11-25 18:53:32,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:53:32,128 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 576 mSDsluCounter, 2683 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 3252 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:32,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 3252 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:53:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-11-25 18:53:32,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 800. [2021-11-25 18:53:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 533 states have (on average 1.4859287054409005) internal successors, (792), 567 states have internal predecessors, (792), 214 states have call successors, (214), 55 states have call predecessors, (214), 52 states have return successors, (217), 204 states have call predecessors, (217), 210 states have call successors, (217) [2021-11-25 18:53:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1223 transitions. [2021-11-25 18:53:32,254 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1223 transitions. Word has length 49 [2021-11-25 18:53:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:32,257 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1223 transitions. [2021-11-25 18:53:32,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:53:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1223 transitions. [2021-11-25 18:53:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 18:53:32,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:32,263 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:32,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:53:32,264 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1102540507, now seen corresponding path program 1 times [2021-11-25 18:53:32,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:32,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251263795] [2021-11-25 18:53:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:32,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:53:32,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251263795] [2021-11-25 18:53:32,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251263795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:32,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:32,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:53:32,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400294820] [2021-11-25 18:53:32,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:32,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:53:32,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:53:32,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:53:32,468 INFO L87 Difference]: Start difference. First operand 800 states and 1223 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:53:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:32,794 INFO L93 Difference]: Finished difference Result 2370 states and 3657 transitions. [2021-11-25 18:53:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:53:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2021-11-25 18:53:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:32,813 INFO L225 Difference]: With dead ends: 2370 [2021-11-25 18:53:32,813 INFO L226 Difference]: Without dead ends: 1583 [2021-11-25 18:53:32,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:53:32,821 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 633 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:32,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1384 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:53:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-11-25 18:53:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1511. [2021-11-25 18:53:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1035 states have (on average 1.4985507246376812) internal successors, (1551), 1087 states have internal predecessors, (1551), 381 states have call successors, (381), 99 states have call predecessors, (381), 94 states have return successors, (401), 352 states have call predecessors, (401), 375 states have call successors, (401) [2021-11-25 18:53:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 2333 transitions. [2021-11-25 18:53:32,947 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 2333 transitions. Word has length 50 [2021-11-25 18:53:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:32,948 INFO L470 AbstractCegarLoop]: Abstraction has 1511 states and 2333 transitions. [2021-11-25 18:53:32,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 18:53:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 2333 transitions. [2021-11-25 18:53:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 18:53:32,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:32,957 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:32,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:53:32,957 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:32,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1387708293, now seen corresponding path program 1 times [2021-11-25 18:53:32,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:32,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515036019] [2021-11-25 18:53:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:32,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:53:33,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515036019] [2021-11-25 18:53:33,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515036019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:33,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:33,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:53:33,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61300613] [2021-11-25 18:53:33,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:33,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:53:33,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:33,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:53:33,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:53:33,120 INFO L87 Difference]: Start difference. First operand 1511 states and 2333 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 18:53:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:34,080 INFO L93 Difference]: Finished difference Result 3931 states and 6280 transitions. [2021-11-25 18:53:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:53:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2021-11-25 18:53:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:34,106 INFO L225 Difference]: With dead ends: 3931 [2021-11-25 18:53:34,107 INFO L226 Difference]: Without dead ends: 2432 [2021-11-25 18:53:34,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:53:34,121 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 710 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 3599 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:34,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 3599 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:53:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-11-25 18:53:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2218. [2021-11-25 18:53:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 1523 states have (on average 1.4917925147734734) internal successors, (2272), 1607 states have internal predecessors, (2272), 554 states have call successors, (554), 147 states have call predecessors, (554), 140 states have return successors, (623), 506 states have call predecessors, (623), 546 states have call successors, (623) [2021-11-25 18:53:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 3449 transitions. [2021-11-25 18:53:34,309 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 3449 transitions. Word has length 94 [2021-11-25 18:53:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:34,312 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 3449 transitions. [2021-11-25 18:53:34,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 18:53:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 3449 transitions. [2021-11-25 18:53:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 18:53:34,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:34,319 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:34,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:53:34,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:34,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2107044805, now seen corresponding path program 1 times [2021-11-25 18:53:34,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:34,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454863847] [2021-11-25 18:53:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:34,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:53:34,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:34,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454863847] [2021-11-25 18:53:34,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454863847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:34,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461942754] [2021-11-25 18:53:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:34,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:34,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:34,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:34,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:53:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:53:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:53:35,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:53:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461942754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:35,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:53:35,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:53:35,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662060441] [2021-11-25 18:53:35,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:35,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:53:35,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:53:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:53:35,229 INFO L87 Difference]: Start difference. First operand 2218 states and 3449 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:53:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:35,598 INFO L93 Difference]: Finished difference Result 6364 states and 10153 transitions. [2021-11-25 18:53:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:53:35,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2021-11-25 18:53:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:35,641 INFO L225 Difference]: With dead ends: 6364 [2021-11-25 18:53:35,641 INFO L226 Difference]: Without dead ends: 4158 [2021-11-25 18:53:35,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:53:35,664 INFO L933 BasicCegarLoop]: 1128 mSDtfsCounter, 596 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:35,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 1666 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:53:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2021-11-25 18:53:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 4040. [2021-11-25 18:53:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 2789 states have (on average 1.5030476873431338) internal successors, (4192), 2959 states have internal predecessors, (4192), 987 states have call successors, (987), 264 states have call predecessors, (987), 263 states have return successors, (1156), 902 states have call predecessors, (1156), 979 states have call successors, (1156) [2021-11-25 18:53:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 6335 transitions. [2021-11-25 18:53:35,985 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 6335 transitions. Word has length 92 [2021-11-25 18:53:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:35,986 INFO L470 AbstractCegarLoop]: Abstraction has 4040 states and 6335 transitions. [2021-11-25 18:53:35,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:53:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 6335 transitions. [2021-11-25 18:53:35,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 18:53:35,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:35,991 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:36,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:53:36,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:36,205 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -417977892, now seen corresponding path program 1 times [2021-11-25 18:53:36,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:36,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908453959] [2021-11-25 18:53:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:36,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:53:36,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:36,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908453959] [2021-11-25 18:53:36,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908453959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:36,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481571] [2021-11-25 18:53:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:36,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:36,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:36,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:36,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:53:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:36,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:53:36,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:53:36,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:53:36,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:36,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:53:36,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:53:36,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061442309] [2021-11-25 18:53:36,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:36,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:53:36,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:53:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:53:36,945 INFO L87 Difference]: Start difference. First operand 4040 states and 6335 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:53:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:37,326 INFO L93 Difference]: Finished difference Result 9064 states and 14368 transitions. [2021-11-25 18:53:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:53:37,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2021-11-25 18:53:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:37,376 INFO L225 Difference]: With dead ends: 9064 [2021-11-25 18:53:37,376 INFO L226 Difference]: Without dead ends: 5036 [2021-11-25 18:53:37,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:53:37,413 INFO L933 BasicCegarLoop]: 832 mSDtfsCounter, 594 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:37,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 1367 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:53:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2021-11-25 18:53:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 4972. [2021-11-25 18:53:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4972 states, 3443 states have (on average 1.5117629973860005) internal successors, (5205), 3656 states have internal predecessors, (5205), 1205 states have call successors, (1205), 321 states have call predecessors, (1205), 323 states have return successors, (1411), 1103 states have call predecessors, (1411), 1197 states have call successors, (1411) [2021-11-25 18:53:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4972 states to 4972 states and 7821 transitions. [2021-11-25 18:53:37,760 INFO L78 Accepts]: Start accepts. Automaton has 4972 states and 7821 transitions. Word has length 94 [2021-11-25 18:53:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:37,761 INFO L470 AbstractCegarLoop]: Abstraction has 4972 states and 7821 transitions. [2021-11-25 18:53:37,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:53:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4972 states and 7821 transitions. [2021-11-25 18:53:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 18:53:37,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:37,766 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:37,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:37,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:37,989 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash -11691783, now seen corresponding path program 1 times [2021-11-25 18:53:37,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:37,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586993183] [2021-11-25 18:53:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:37,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:53:38,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:38,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586993183] [2021-11-25 18:53:38,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586993183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778353764] [2021-11-25 18:53:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:38,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:38,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:38,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:38,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:53:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:53:38,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:53:38,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:53:38,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778353764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:38,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:53:38,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2021-11-25 18:53:38,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183934587] [2021-11-25 18:53:38,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:38,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:53:38,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:38,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:53:38,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:53:38,842 INFO L87 Difference]: Start difference. First operand 4972 states and 7821 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 18:53:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:39,377 INFO L93 Difference]: Finished difference Result 10962 states and 17214 transitions. [2021-11-25 18:53:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:53:39,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2021-11-25 18:53:39,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:39,434 INFO L225 Difference]: With dead ends: 10962 [2021-11-25 18:53:39,435 INFO L226 Difference]: Without dead ends: 6002 [2021-11-25 18:53:39,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:53:39,478 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 441 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:39,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 1868 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:53:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-11-25 18:53:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 5958. [2021-11-25 18:53:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5958 states, 4096 states have (on average 1.472900390625) internal successors, (6033), 4313 states have internal predecessors, (6033), 1412 states have call successors, (1412), 426 states have call predecessors, (1412), 449 states have return successors, (1751), 1324 states have call predecessors, (1751), 1401 states have call successors, (1751) [2021-11-25 18:53:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5958 states to 5958 states and 9196 transitions. [2021-11-25 18:53:39,945 INFO L78 Accepts]: Start accepts. Automaton has 5958 states and 9196 transitions. Word has length 99 [2021-11-25 18:53:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:39,945 INFO L470 AbstractCegarLoop]: Abstraction has 5958 states and 9196 transitions. [2021-11-25 18:53:39,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 18:53:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5958 states and 9196 transitions. [2021-11-25 18:53:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 18:53:39,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:39,951 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:39,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:40,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:40,165 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1132720807, now seen corresponding path program 1 times [2021-11-25 18:53:40,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:40,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468023121] [2021-11-25 18:53:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:40,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:53:40,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:40,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468023121] [2021-11-25 18:53:40,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468023121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:40,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453461368] [2021-11-25 18:53:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:40,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:40,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:40,348 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:40,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:53:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 18:53:40,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:53:41,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:53:41,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453461368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012577981] [2021-11-25 18:53:41,757 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2021-11-25 18:53:41,757 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:41,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:41,767 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:41,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:47,802 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 18:53:54,501 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2021-11-25 18:53:54,817 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 18:53:56,813 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 18:53:56,982 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-25 18:53:57,058 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 18:53:57,133 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 18:54:01,046 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 18:54:01,584 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 18:54:01,734 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:54:28,093 WARN L227 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:54:34,080 WARN L227 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:55:24,586 WARN L227 SmtUtils]: Spent 9.14s on a formula simplification. DAG size of input: 511 DAG size of output: 450 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:55:35,295 WARN L227 SmtUtils]: Spent 9.54s on a formula simplification. DAG size of input: 547 DAG size of output: 458 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:55:41,017 WARN L227 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:55:53,028 WARN L227 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 637 DAG size of output: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:55:58,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2012577981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:58,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:55:58,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2021-11-25 18:55:58,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098494347] [2021-11-25 18:55:58,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:58,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 18:55:58,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:58,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 18:55:58,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:55:58,140 INFO L87 Difference]: Start difference. First operand 5958 states and 9196 transitions. Second operand has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-25 18:56:27,467 WARN L227 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 607 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:56:36,835 WARN L227 SmtUtils]: Spent 9.08s on a formula simplification. DAG size of input: 613 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:57:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:14,721 INFO L93 Difference]: Finished difference Result 12055 states and 18610 transitions. [2021-11-25 18:57:14,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 18:57:14,722 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2021-11-25 18:57:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:14,766 INFO L225 Difference]: With dead ends: 12055 [2021-11-25 18:57:14,766 INFO L226 Difference]: Without dead ends: 6109 [2021-11-25 18:57:14,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 153.3s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 18:57:14,797 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 158 mSDsluCounter, 5987 mSDsCounter, 0 mSdLazyCounter, 9449 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 6607 SdHoareTripleChecker+Invalid, 9510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 9449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:14,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 6607 Invalid, 9510 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [61 Valid, 9449 Invalid, 0 Unknown, 0 Unchecked, 39.4s Time] [2021-11-25 18:57:14,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2021-11-25 18:57:15,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 6030. [2021-11-25 18:57:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6030 states, 4146 states have (on average 1.4688856729377713) internal successors, (6090), 4362 states have internal predecessors, (6090), 1427 states have call successors, (1427), 435 states have call predecessors, (1427), 456 states have return successors, (1767), 1338 states have call predecessors, (1767), 1416 states have call successors, (1767) [2021-11-25 18:57:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 9284 transitions. [2021-11-25 18:57:15,219 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 9284 transitions. Word has length 100 [2021-11-25 18:57:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:15,220 INFO L470 AbstractCegarLoop]: Abstraction has 6030 states and 9284 transitions. [2021-11-25 18:57:15,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-25 18:57:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 9284 transitions. [2021-11-25 18:57:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-25 18:57:15,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:15,225 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:15,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:15,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 18:57:15,453 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:57:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:15,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1741949641, now seen corresponding path program 1 times [2021-11-25 18:57:15,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:15,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089507240] [2021-11-25 18:57:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:15,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 18:57:15,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089507240] [2021-11-25 18:57:15,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089507240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:57:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800441743] [2021-11-25 18:57:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:15,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:15,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:15,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:15,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:57:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:16,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 18:57:16,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:57:16,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:57:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 18:57:16,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800441743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:57:16,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706038219] [2021-11-25 18:57:16,859 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2021-11-25 18:57:16,859 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:57:16,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:57:16,860 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:57:16,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:57:21,449 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 18:57:30,128 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2021-11-25 18:57:30,143 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 18:57:32,281 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 18:57:32,471 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-25 18:57:32,559 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 18:57:32,645 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 18:57:36,127 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 18:57:36,652 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 18:57:36,791 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:58:03,689 WARN L227 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:58:09,790 WARN L227 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:59:21,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [706038219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:21,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:59:21,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2021-11-25 18:59:21,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044312368] [2021-11-25 18:59:21,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:21,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:59:21,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:59:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 18:59:21,520 INFO L87 Difference]: Start difference. First operand 6030 states and 9284 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-25 19:00:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:20,859 INFO L93 Difference]: Finished difference Result 12033 states and 18572 transitions. [2021-11-25 19:00:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 19:00:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2021-11-25 19:00:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:20,905 INFO L225 Difference]: With dead ends: 12033 [2021-11-25 19:00:20,905 INFO L226 Difference]: Without dead ends: 6099 [2021-11-25 19:00:20,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 270 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 132.5s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 19:00:20,933 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 183 mSDsluCounter, 5544 mSDsCounter, 0 mSdLazyCounter, 8338 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 6172 SdHoareTripleChecker+Invalid, 8408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 8338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:20,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 6172 Invalid, 8408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [70 Valid, 8338 Invalid, 0 Unknown, 0 Unchecked, 31.3s Time] [2021-11-25 19:00:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6099 states. [2021-11-25 19:00:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6099 to 6032. [2021-11-25 19:00:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6032 states, 4147 states have (on average 1.4685314685314685) internal successors, (6090), 4363 states have internal predecessors, (6090), 1427 states have call successors, (1427), 436 states have call predecessors, (1427), 457 states have return successors, (1767), 1338 states have call predecessors, (1767), 1416 states have call successors, (1767) [2021-11-25 19:00:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6032 states to 6032 states and 9284 transitions. [2021-11-25 19:00:21,331 INFO L78 Accepts]: Start accepts. Automaton has 6032 states and 9284 transitions. Word has length 106 [2021-11-25 19:00:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:21,332 INFO L470 AbstractCegarLoop]: Abstraction has 6032 states and 9284 transitions. [2021-11-25 19:00:21,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-25 19:00:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 6032 states and 9284 transitions. [2021-11-25 19:00:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-25 19:00:21,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:21,338 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:21,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:21,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:00:21,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:00:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash 555137121, now seen corresponding path program 1 times [2021-11-25 19:00:21,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:21,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297005206] [2021-11-25 19:00:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:21,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:00:21,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:21,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297005206] [2021-11-25 19:00:21,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297005206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:21,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356868458] [2021-11-25 19:00:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:21,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:21,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:21,727 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:21,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:00:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:22,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:00:22,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:00:22,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:00:22,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356868458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:22,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645721299] [2021-11-25 19:00:22,867 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2021-11-25 19:00:22,867 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:22,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:22,869 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:22,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:26,439 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 19:00:36,461 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2021-11-25 19:00:36,637 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 19:00:38,568 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 19:00:38,746 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-25 19:00:38,863 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 19:00:38,938 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 19:00:42,258 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 19:00:42,784 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 19:00:42,924 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:08,640 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:01:14,341 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:02:41,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1645721299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:41,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:41,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2021-11-25 19:02:41,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142670988] [2021-11-25 19:02:41,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:41,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 19:02:41,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 19:02:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:02:41,154 INFO L87 Difference]: Start difference. First operand 6032 states and 9284 transitions. Second operand has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-25 19:03:07,344 WARN L227 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:03:14,094 WARN L227 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:03:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:39,153 INFO L93 Difference]: Finished difference Result 12034 states and 18561 transitions. [2021-11-25 19:03:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 19:03:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 112 [2021-11-25 19:03:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:39,182 INFO L225 Difference]: With dead ends: 12034 [2021-11-25 19:03:39,183 INFO L226 Difference]: Without dead ends: 6100 [2021-11-25 19:03:39,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 284 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 149.6s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2021-11-25 19:03:39,204 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 288 mSDsluCounter, 3752 mSDsCounter, 0 mSdLazyCounter, 7253 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 4284 SdHoareTripleChecker+Invalid, 7359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 7253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:39,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 4284 Invalid, 7359 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [106 Valid, 7253 Invalid, 0 Unknown, 0 Unchecked, 26.4s Time] [2021-11-25 19:03:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2021-11-25 19:03:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 6033. [2021-11-25 19:03:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6033 states, 4148 states have (on average 1.4681774349083896) internal successors, (6090), 4364 states have internal predecessors, (6090), 1426 states have call successors, (1426), 437 states have call predecessors, (1426), 458 states have return successors, (1757), 1337 states have call predecessors, (1757), 1415 states have call successors, (1757) [2021-11-25 19:03:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6033 states to 6033 states and 9273 transitions. [2021-11-25 19:03:39,605 INFO L78 Accepts]: Start accepts. Automaton has 6033 states and 9273 transitions. Word has length 112 [2021-11-25 19:03:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:39,606 INFO L470 AbstractCegarLoop]: Abstraction has 6033 states and 9273 transitions. [2021-11-25 19:03:39,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-25 19:03:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 6033 states and 9273 transitions. [2021-11-25 19:03:39,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-25 19:03:39,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:39,617 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:39,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:39,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:39,833 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1245449919, now seen corresponding path program 1 times [2021-11-25 19:03:39,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:39,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951249386] [2021-11-25 19:03:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:39,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 19:03:40,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:40,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951249386] [2021-11-25 19:03:40,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951249386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861941984] [2021-11-25 19:03:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:40,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:40,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:40,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:40,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:03:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:40,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:03:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 19:03:40,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:03:40,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861941984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:40,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:03:40,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-25 19:03:40,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201463385] [2021-11-25 19:03:40,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:40,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:40,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:40,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:03:40,778 INFO L87 Difference]: Start difference. First operand 6033 states and 9273 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 19:03:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:41,193 INFO L93 Difference]: Finished difference Result 10345 states and 16317 transitions. [2021-11-25 19:03:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:41,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 183 [2021-11-25 19:03:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:41,225 INFO L225 Difference]: With dead ends: 10345 [2021-11-25 19:03:41,225 INFO L226 Difference]: Without dead ends: 6340 [2021-11-25 19:03:41,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:03:41,243 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 33 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:41,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1249 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2021-11-25 19:03:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6117. [2021-11-25 19:03:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6117 states, 4220 states have (on average 1.4630331753554502) internal successors, (6174), 4436 states have internal predecessors, (6174), 1438 states have call successors, (1438), 437 states have call predecessors, (1438), 458 states have return successors, (1769), 1349 states have call predecessors, (1769), 1427 states have call successors, (1769) [2021-11-25 19:03:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 9381 transitions. [2021-11-25 19:03:41,656 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 9381 transitions. Word has length 183 [2021-11-25 19:03:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:41,657 INFO L470 AbstractCegarLoop]: Abstraction has 6117 states and 9381 transitions. [2021-11-25 19:03:41,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 19:03:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 9381 transitions. [2021-11-25 19:03:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-25 19:03:41,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:41,670 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:41,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:41,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:03:41,897 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1667988584, now seen corresponding path program 1 times [2021-11-25 19:03:41,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:41,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742334656] [2021-11-25 19:03:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:41,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 19:03:42,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:42,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742334656] [2021-11-25 19:03:42,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742334656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:42,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322266571] [2021-11-25 19:03:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:42,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:42,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:42,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:03:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:42,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:03:42,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-25 19:03:42,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:03:42,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322266571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:42,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:03:42,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-25 19:03:42,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546047547] [2021-11-25 19:03:42,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:42,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:03:42,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:42,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:03:42,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:03:42,906 INFO L87 Difference]: Start difference. First operand 6117 states and 9381 transitions. Second operand has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-25 19:03:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:46,766 INFO L93 Difference]: Finished difference Result 15597 states and 24519 transitions. [2021-11-25 19:03:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:03:46,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 183 [2021-11-25 19:03:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:46,813 INFO L225 Difference]: With dead ends: 15597 [2021-11-25 19:03:46,813 INFO L226 Difference]: Without dead ends: 9585 [2021-11-25 19:03:46,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:03:46,843 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1677 mSDsluCounter, 2855 mSDsCounter, 0 mSdLazyCounter, 6269 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 3739 SdHoareTripleChecker+Invalid, 7107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 6269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:46,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 3739 Invalid, 7107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 6269 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 19:03:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9585 states. [2021-11-25 19:03:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9585 to 8571. [2021-11-25 19:03:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8571 states, 5896 states have (on average 1.4469131614654003) internal successors, (8531), 6158 states have internal predecessors, (8531), 1993 states have call successors, (1993), 676 states have call predecessors, (1993), 681 states have return successors, (2528), 1876 states have call predecessors, (2528), 1974 states have call successors, (2528) [2021-11-25 19:03:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8571 states to 8571 states and 13052 transitions. [2021-11-25 19:03:47,401 INFO L78 Accepts]: Start accepts. Automaton has 8571 states and 13052 transitions. Word has length 183 [2021-11-25 19:03:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:47,402 INFO L470 AbstractCegarLoop]: Abstraction has 8571 states and 13052 transitions. [2021-11-25 19:03:47,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-25 19:03:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 8571 states and 13052 transitions. [2021-11-25 19:03:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-25 19:03:47,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:47,417 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:47,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:47,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:47,645 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:47,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1976205702, now seen corresponding path program 1 times [2021-11-25 19:03:47,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:47,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034258920] [2021-11-25 19:03:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:47,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 19:03:47,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:47,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034258920] [2021-11-25 19:03:47,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034258920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:47,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050650907] [2021-11-25 19:03:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:47,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:47,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:47,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337d419a-748a-4b2b-9490-8a4663851fc8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:03:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:03:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 95 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:03:48,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 19:03:49,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050650907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:49,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269176713] [2021-11-25 19:03:49,413 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2021-11-25 19:03:49,413 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:49,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:49,414 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:49,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:55,871 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2021-11-25 19:04:01,917 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 201 for LOIs [2021-11-25 19:04:05,125 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 92 for LOIs [2021-11-25 19:04:05,619 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 72 for LOIs [2021-11-25 19:04:05,756 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 74 for LOIs [2021-11-25 19:04:05,786 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2021-11-25 19:04:05,789 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 36 for LOIs [2021-11-25 19:04:05,804 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 19:04:07,693 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 19:04:07,860 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2021-11-25 19:04:07,862 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 53 for LOIs [2021-11-25 19:04:07,966 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 47 for LOIs [2021-11-25 19:04:07,971 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2021-11-25 19:04:08,008 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 19:04:11,266 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 19:04:11,847 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 19:04:11,985 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:37,517 WARN L227 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:04:43,331 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:05:00,585 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 683 DAG size of output: 579 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)